refactor: parse v2 receipts

[gusinacio]

• Try to decode a base64 before trying serde_json.
• If success, proceed to decode using Protobuf for v2
• otherwise use normal v1 serde_json deserialization process

[suchapalaver]

❤️

[coveralls]

Pull Request Test Coverage Report for Build 13316871610

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 44 of 44 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on gustavo/parse-v2-receipts at 75.797%

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Totals
Change from base Build 13316828029:	75.8%
Covered Lines:	8346
Relevant Lines:	11011

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💛 - Coveralls